Liquid-crystal tunable filter based on sapphire microspheres

Gilardi, Giovanni and Donisi, Domenico and Serpengüzel, Ali and Beccherelli, Romeo (2009) Liquid-crystal tunable filter based on sapphire microspheres. Optics Letters, 34 (21). pp. 3253-3255. ISSN 0146-9592

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We design an integrated optoelectronic device based on the whispering-gallery modes of a sapphire microsphere integrated with a liquid-crystal tuning medium to produce a narrowband, electrically tunable, channel-dropping filter. The sapphire microsphere is glued over a diffused waveguide in a glass substrate. At the base of the microsphere, a small volume of liquid crystal is infiltrated. We numerically evaluate the performance of the device and demonstrate a voltage tuning of the narrowband resonances.

Item Type: Article
Subjects: 600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini
Depositing User: Matteo Viola
Date Deposited: 03 Jan 2013 14:10
Last Modified: 03 Jan 2013 14:10

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